is_user_member_of_blog

Source code

function is_user_member_of_blog( $user_id = 0, $blog_id = 0 ) {

	$user_id = (int) $user_id;

	$blog_id = (int) $blog_id;



	if ( empty( $user_id ) )

		$user_id = get_current_user_id();



	if ( empty( $blog_id ) )

		$blog_id = get_current_blog_id();



	$blogs = get_blogs_of_user( $user_id );

	if ( is_array( $blogs ) )

		return array_key_exists( $blog_id, $blogs );

	else

		return false;

}